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ecosystem /EE-koh-sis-tuhm/
noun
all living things plus their environment working together as one system
"Wetlands are rich ecosystems that support countless species of birds and fish."
habitat /HA-bi-tat/
noun
the natural home where a plant or animal lives
"Melting sea ice is destroying the polar bear's natural habitat."
emission /ee-MISH-uhn/
noun
gas or other substances released into the air
"The city has cut its carbon emissions by a third in five years."
conservation /kon-sur-VAY-shuhn/
noun
protecting nature, animals, and natural resources
"Conservation programs have brought wolves back to the valley."
erosion /ee-ROH-zhuhn/
noun
soil or rock slowly worn away by wind or water
"Coastal erosion is eating away the cliffs near the fishing village."
permafrost /PUR-muh-frost/
noun
ground that stays frozen all year round
"Thawing permafrost is releasing methane into the atmosphere."
desertification /deh-zur-tuh-fuh-KAY-shuhn/
noun
rich farmland slowly turning into desert
"Overgrazing has accelerated desertification across the region."
sequestration /seh-kwes-TRAY-shuhn/
noun
capturing carbon and storing it away from the air
"Forests play a vital role in carbon sequestration."
anthropogenic /an-thruh-puh-JEN-ik/
adjective
caused by human activity
"Scientists agree that modern climate change is largely anthropogenic."
regenerative /ree-JEN-uh-ruh-tiv/
adjective
restoring or renewing nature rather than harming it
"Regenerative farming rebuilds the soil instead of wearing it out."
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When we describe amounts in English, we choose our words carefully. A healthy **ecosystem** needs **a lot of** rain, and scientists speak of **lots of** rainfall or **loads of** new species in positive sentences.
We say **many** with countable nouns and **much** with uncountable nouns, mostly in negative sentences and questions. We do not see **many** polar bears in a shrinking **habitat**, and there is not **much** clean air left in cities with heavy **emissions**.
**Plenty of** means more than enough, a comfortable surplus. A well-run **conservation** project always has **plenty of** volun
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